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Anatomy of Anterior abdominal muscles

2.
MOB TCD
Anterior Abdominal Wall
• The muscles of the anterior
abdominal wall play a major role
in movements of the trunk
• Protecting the abdominal organs
• Increase the intra-abdominal
pressure, aid in expiration and
all straining activities such as
micturition, coughing and
vomiting
• Supplied by lower five intercostal
and subcostal nerves

3.
MOB TCD
Anterior Abdominal Muscles
• Strong abdominals are important in
helping to stabilise the trunk
• Support the spine
• They flex and rotate the trunk
• Acting with the adductors and
abductors of the hip
• They help to stabilise the pelvis
during walking and running

14.
MOB TCD
External Oblique
• Acting separately
• The external oblique flexes the
vertebral column laterally and
rotates it to the opposite side
• If the thorax is fixed by
contracting both external
obliques, you can tilt the
symphysis pubis superiorly and
flex the trunk, posterior pelvic tilt
• Movement of the iliac crests
determines the direction of the tilt

23.
MOB TCD
Rectus Abdominus
• The rectus muscles (recti)
are the most powerful
flexors of the vertebral
column
• When raising the head from
a supine position
• A movement often used to
strengthen the abdominals
• It is the recti that contract first
• When the shoulders start to rise upwards, the
obliques start to contract